package com.planetbeing.touchFree;

import java.io.ByteArrayOutputStream;

public class SimpleASNWriter {
    private ByteArrayOutputStream data;

    /**
     * Creates a new SimpleASNWriter object.
     */
    public SimpleASNWriter() {
        this.data = new ByteArrayOutputStream();
    }

    /**
     *
     *
     * @param b
     */
    public void writeByte(int b) {
        data.write(b);
    }

    /**
     *
     *
     * @param b
     */
    public void writeData(byte[] b) {
        writeLength(b.length);
        this.data.write(b, 0, b.length);
    }

    /**
     *
     *
     * @param length
     */
    public void writeLength(int length) {
        if (length < 0x80) {
            data.write(length);
        } else {
            if (length < 0x100) {
                data.write(0x81);
                data.write(length);
            } else if (length < 0x10000) {
                data.write(0x82);
                data.write(length >>> 8);
                data.write(length);
            } else if (length < 0x1000000) {
                data.write(0x83);
                data.write(length >>> 16);
                data.write(length >>> 8);
                data.write(length);
            } else {
                data.write(0x84);
                data.write(length >>> 24);
                data.write(length >>> 16);
                data.write(length >>> 8);
                data.write(length);
            }
        }
    }

    /**
     *
     *
     * @return
     */
    public byte[] toByteArray() {
        return data.toByteArray();
    }
}